I would say ethereum lately but dash is my new favourite one. not the best one maybe but definitely the promising one. it was not people's first choice among altcoins maybe still it is the same for the majority of people who think to invest on altcoins but it has a uptrend recently, looks like it keeps going like that. ofcourse, this is not an advice.

Make a "DENT" in 2018!!! I have a special place for this project. There are so many mobile users and if they deliver on their vision the world will be their oyster. Buy your dent coins with pennies for the time being. Their app is suppose to come out next month

You can invest in BCH or BTG as they are two children from Bitcoin. I expect both of them to reach $ 2,000 in 2018 and may soon reach new prices in the future. I think the Executive Board and the BTG can compete directly with the BTC

Can not predict anything but my advice is that you should choose altcoin in the top 100 coinmarketcap will be safer because it can guarantee you a good profit and the price may rise very high in time time to come

Buy $RISE from 3300-3700. I believe it will have a pump in the coming weeks, especially with this possible alt boom. Volume is increasing steadily and it’s nearing the end of a correction and accumulation phase! Also breaking out from the infamous triangle

There are only a few altcoins that have a potential to be huge in 2018 and the rest of them are all shitcoins. If you want to invest in altcoins but you don't know which one is good, it is better to look at their project and see who's behind it. Anyone can create coins these days and if they are not credible enough to support that coin, it will all just go to waste. So try to do some research.

In my opinion, I recommend you to try Siacoin, I've looked at it and it has 31 billion of circulating supply as of now when I looked at coinmarketcap.com. The founders behind it look legit so far and they focused more on their product than marketing their own so it shows that it has plenty of room to grow given the fact that there will be a good marketing for them.